package acm.蓝桥22;

import java.util.Scanner;

/**
 * 二维前缀和+二分
 */
public class D {
	static int[][] sum;
	static int n,m;
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		n=sc.nextInt();
		m=sc.nextInt();
		
	}
}
